MySQL

The following articles mainly describe the correct operation steps of the MySQL database, including the query statements, the correct operation steps for creating the MySQL database, and the actual operation procedures for creating tables, the

This article describes how to log on to the MySQL database server correctly. We all know that the correct logon to the MySQL database server often occurs in practical applications, therefore, optimization is also highly concerned. To log on to MySQL

This article mainly describes the actual steps for installing and configuring the green MySQL database. The installation and configuration of the MySQL database are often used in actual operations, therefore, you have a better understanding of it.

This article mainly tells you about the foreign key and MySQL reference integrity in MySQL development. We all know that MySQL reference integrity is a very important concept in database design. In different lists of systems, MySQL integrity is

This article mainly describes the correct operation method of MySQL replication settings. I believe that if you master the MySQL replication settings technology, it will be of great help in your future studies or work, the following is a description

To learn about mysql databases, you must first master frequently used mysql commands. The following describes nine frequently used mysql commands, which may help you learn frequently used mysql commands. 1. start the MYSQL service. net start mysql

One of the most important parts of MySQL is that indexes cannot be mentioned when learning MySQL databases. The following describes various types of MySQL indexes for your reference. 1. Common Index A common INDEX is an INDEX defined by a keyword

How can I find slow SQL statements in mysql? This may be a problem for many people. The following describes how to find slow SQL statements in mysql for your reference. When Mysql is started, add the -- log-slow-queries parameter to record the SQL

MySQL GROUP_CONCAT is a very important function. MySQL GROUP_CONCAT is added to MySQL 4.1. the syntax of this function is described in detail below. MySQL GROUP_CONCAT (expr)The complete syntax is as follows: GROUP_CONCAT ([DISTINCT] expr [, expr...]

In MySQL, The concat_ws function is a very important MySQL function. The following describes how to use this function. If you are interested in this function, take a look. How to Use the concat_ws function in MySQL:CONCAT_WS (separator, str1, str2 ,.

We need to know the syntax of MySQL string connection function repeat (). The following describes the knowledge of MySQL string connection function for your reference. MySQL string connection function-repeat () function This function is used to

The MySql time functions described below are used to obtain the current time. These MySql time functions are of great practical value and hope to help you learn MySql time functions. mysql> select current_timestamp();   +---------------------+

Designing a MySql index can greatly improve your database query efficiency. When designing MySql indexes, there are some issues that deserve our attention: 1. Create a MySql IndexIndexes are especially important for applications where queries

The MySQL command line is very powerful and can even be used to back up the database. The MySQL command line described below is used to back up the database. I hope it will help you. Note: The mysqldump command is executed in the DOS mysql \ bin

In MySQL sorting, Sort_merge_passes is added, and MySQL stores the sorting results in the memory in a temporary file. After the records are found, they are sorted again. MySQL sorting usage: mysql> show global status like 'sort%';   +---------

If you want to improve the efficiency of MySQL random query, You need to optimize it. The following describes an example of successful MySQL random Query Optimization for your reference. I always thought that MySQL would randomly query several

Learning Mysql databases, Mysql table creation is the most basic knowledge. The following is an example of creating a Mysql table for your reference. I hope it will help you learn how to create a Mysql table. Create three columns:Id, which is a

What command should I use to view the Mysql table structure? The following describes the commands for viewing the Mysql table structure in detail. If you have encountered a similar problem in the Mysql table organization, you may wish to take a look.

How can I implement a MySQL foreign key definition? The following describes how to define a foreign key in MySQL for your reference. We hope this will help you learn how to define foreign keys in MySQL. Define data tables Assume that a computer

How can I add fields to MySQL? This is a problem that many new users have just mentioned. The following describes how to add and delete fields in MySQL. Add a MySQL field: Alter table 'user _ movement_log' Add column GatewayId int not null